haha, thanks silvertrb ;-)
Summer, unless there's a world cup or european championship going on, leaves stadiums empty. So they would all be available for drum corps. Grass can be cleaned or replaced.
Also, I think that finals should be held in the heart of europe, meaning London, Paris or Berlin. Where, btw, the most of european DC fans live. Spain has not even clue what marching band is, Italy is still in the process of getting a clue.
I was also thinking about Amsterdam Arena:
but it's indoor...
btw I performed in the Giuseppe Meazza in Milan, we were only 64 (36 winds) and the echo was terrible... Think about 150 members.
In general, stadiums with a running track should be avoided. That would keep fans, I think, too far from the front side line. So soccer dedicated stadiums should be picked.